Mill roll stand



L. w. Rosi-:mus

MILL ROLL STAND Jan. 8, 1952 3 Sheets-Sheet l Filed April 14, 1947 ATTORNEY N INVENTOR. *1 :Q Lows w. Rosal us WMM l Jan. 8, 1952 L. W. ROSEL-IUS MILL ROLL STAND 3 Sheets-Sheet 2 Filed April 14, 1947 INVENTOR.

LOUIS VV. ROS LJU S A'T TORNEY Patented Jan. 8, 1952 MILL ROLL STAND Louis Roselius, Lake Success, N. Y., assigner to S & S Corrugated Paper Machinery Co., Inc., Brooklyn, N. Y., a corporation of New York Application April 14, 1947, Serial No. 741,217 2 claims. (ci. 242-58) My present invention relates to mill roll stands, and more particularly to apparatus for rotatably supporting a mill roll of heavy kraft paper intended to be utilized in various corrugating operations to form either single-face, double-face or double-double corrugated board.

.shaft pushed throughvthe core or by core studs entering partly into the core.

An important object of my invention is the provision of a mill roll stand which need not neces- .sarily support the mill roll at any predetermined level and in which the support of the mill roll does not take place at the core.

Another object of my invention is the provision of simplified roller means for supporting a mill roll, said roller means supporting the mill roll peripherally and permitting it to unwind under the pull exerted on the sheet by the corru-gating apparatus in which the kraft paper is to be used.

Mill rolls of this type weigh as much as a ton or even more and are thus diflicult to handle. In constructions where the mill roll must be supported at the core, the frame-work supporting the mill roll must be cross-braced and suiciently strong to take the load. This makes it necessary to provide a relatively tall structure, the bracing and strengthening of which requires additional expense.

By supporting the mill roll peripherally by a pair of rollers or sets of rollers adjacent the oor, the necessity for a complex interbraced structure is eliminated.

I further contemplate that my novel device be so arranged that as the diameter of the mill roll decreases on unrolling the kraft paper, the rollers vwhich support the same peripherally are auto- [roll supporting apparatus.

2 Figures 3 and 4 are schematic views illustrating the automatic operation of my novel mill roll stand for adjusting the supporting rolls as the diameter of mill roll decreases.

Figure 5 is a plan view of the mill roll'stand A with lthe mill roll removed therefrom.

Figure 6 is a cross-sectional view taken on line 6-6 of Figure 5 looking in the direction of the arrows.

Figure 7 is a schematic view of the electrical circuit required for automatic operation of my novelmill roll stand.

Referring now to Figures 1, 2, 5 and 6, my novel mill roll stand I0 is shown supporting the mill roll which rests on rolls 2 carried by shaft |3 supported in appropriate bearings in the brackets |5-|5, which brackets may be crossbraced in any suitable manner as by the crossrods I1. The opposite support for the mill roll v|| comprises the rollers 26 on shaft 2| rotatably mounted on the movable carriage formed by brackets 23, 23 and 24.

Each of the brackets 23, 23 and 24 is provided with wheels 26, 26 rollin-g on tracks 2l, 21. The outer brackets 23, 23 of the adjustable rolls 20 on Ashaft 2| are each provided with a collar 36 which receives the end 3| of screw shaft 32. Wash- -ers 34 and 35 on the end 3| of screw shaft 32 permit the screw shaft 32 to rotate with respect to the collar 30 but do not permit any longitudinal movement with respect thereto. Screw shaft v32 passes through bearing 40 and 46a mounted on bracket 4|. This structure is duplicated for each side.

Means are provided as hereinafter described for -causing the screw shaft 32 to move longitudinally Iin bearings 40 and 40a to move the :brackets 2 3 to result in movement of brackets 23 andhence in corresponding movement of roll 20 from the position shown by the solid lines of Figure 3 to the position shown by the solid lines of Figure 4 guide roll 1 I.

The bevel gears 59 as shown particularly in the cross-sectional View of Figure 6 have an internally threaded nut extension 62 which meshes with the screw shaft. The bevel gears 59 are fixed against the longitudinal movement by sleeve 63 placed between the bevel gear and bearing 40a and also by the ledge 64 which bears against the outer surface of bearing 49 on the opposite side of the bevel gear 59.

Each bevel gear 59 is freely rotatable in the bearing 40. Thus it will be seen that rotation of bevel gears59 result in corresponding rotation of their nutextension 62 to rotate the screws 32 to move the brackets 23 to adjust the length of the paper sheet. Y

In practice two such mill roll stands are used simultaneously as shown in Figures 1 and 2. The paper 10 from the left-hand mill roll stand is carried under and around guide rolls 1| mounted. on shaft 12 and over guide rolls 13 mounted on.

shaft 14. Shafts 12 and 14 are rotatably carc ried between side frame members 15. Before the paper 10 from the left-hand mill roll stand is used up, the paper 80 from the right-hand nmill roll stand is carriedaround the opposite side l.

of itsV guide roll 1Ia on its shaft 12a and then secured to the surface of the paper 10 above the Before the paper 80 is used up, `the leading edge of paper 10 is carried around its guide roll 1| and adhesively secured to the paper 80 above the guide roll 1I, as indicated in Figure 2. Y

' The brackets 23, 23 are provided with extensions 90, 9 I, one of which carries a light source 92 `and. the other ofi which carries. a photoelectric cell 93, the light source 92 being focused on the photoelectric cell 93. As the mill roll IIY Vdecreases in diameter, as shown at Figure 3, it drops downto intercept the light from light` source 92 so. that it does notstrike the photoelectric cell 93. -1

Appropriate relays areY then operated in response to the cutting off of light from the photoelectric cell 93 to operate the motor to drive the brackets 23 to the left with respect toV Figures l to 4 `in order to raise the mill roll. When the brackets 23 have been moved suinciently to the left, then the mill roll is raised up once more, as shown in Figure 4.

4Again as' the mill roll I I drops down owing to 4 decrease in diameter, the motor is once more 1 energized to drive the rolls in until the posibeen driven suiciently and thus to prevent over- Ydriving by the motor. f

, The operation is shown very schematically in the view of Figure 7 in which current from the power source |00 is connected to operate the device when the double pole switch I 0I is closed.`

Current then flows over conductor |02 through 'the limit switch 96 to motor 50, then through and conductors |03 to motor 50vand conductor |02. The light source 92 is energized from conductors II5 and ||6 connected respectively to conductors |02 and |05.

Thus it will be seen that in operation it is necessary only to pull out the brackets 23 sufciently to support the full size mill roll. In order to facilitate this operation, the worm gear 52 may be provided with a crank socket |30 to receive a crank handle so that the bracket may be pulled out sufficiently or the motor 50 may be-V a reversing motor with appropriate circuit connections or an appropriate reversing lgear connection may be applied to the worm gear 52 or the spiral gear 53. Y

The mill roll is then rolled in on the dolly I40.between the rolls I2 and 20. Push button switch |45 which short-circuits the rel-ay armature |04 is then closed to energize the motor 50 to4 drive the rolls 20 to the left with respect to Figure 1. These rolls are moved in until the roll `I I lifted off thedolly |40, then the switch button |45 is opened and the dolly |40 is removed.

On unwinding of the paper and resultant decrease in diameter of the mill roll, theV light impinging on the photoelectric cell is intercepted thus re-energizing the motor to move the rolls 20 in once more to lift the mill roll up so as to clear the light source and thus ensure that the mill Yrolll is sufficiently high off the floor. The rolls I2 and 20 will obviously be spaced sufficiently to provide a proper bearing for the mill roll; however, should therebe any danger of the mill roll falling off the stand, this may be obviated by appropriate side roll elements including` idler rolls carried by the brackets 23 and I5 and spring biased against the sides of the mill roll thereby tending to hold the mill roll properly in place.

In the foregoing, I have described myv invention solely in connection with preferred illustrative embodiments thereof. Since fmany variations and modifications of my invention should now be obvious to those skilled in the art, I prefer to be bound not by the specific disclosures herein contained but onlyA by the appended claims.

I claim: Y

1. A mill roll stand for supporting a roll of paper while the same is being unwound; said stand comprising a pair of parallel freely rotatable spaced idling rollers for carrying the mill roll; said rollers being initially spaced apart less than the diameter of the mill roll; means for moving one of said rollers toward the other as the diameter of the mill roll decreases during unwinding; said last mentioned means comprising a moving mount for said first mentioned roller; a motor and a connection between said motor and said mount for moving said mount toward and away from said other roller; and means responsive to the decrease in size of the mill roll for controlling the operation of said motor to move said mount toward the other roller as the diameter of themill roll decreases.

2. A mill rcll'stand for supporting a rollof paper while thesame is being unwound; said stand comprising a pair of parallel freely rotatable spaced idling rollers for carrying the mill roll; said rollers being initially spaced apart less thanA the diameter of the mill roll; means for moving one of said rollers toward the other as the diameter of the mill roll decreases during un- Winding; said last mentioned means comprising a moving mount for said rst mentioned roller; a motor and a connection between said motor and said mount for moving said mount toward and 5 away from said other roller; and means for automatically controlling the operation of said motor to move saidmount toward the other roller as the diameter of the mill roll decreases; said automatic means including a light source on one side of said mill roll stand, a photo-sensitive device on the opposite side, the light beam of the light source impnging on the photo-sensitive device; said light beam traversing the mill roll stand between the rollers and below the level thereof; said light beam being intercepted when the diameter of the mill roll is decreased suiciently to cause it to lower itself between the rollers, and a connection between the photo-sensitive device and the motor.

LOUIS W. ROSELIUS.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

